"Dancing with the Stars" contestant PRISCILLA PRESLEY just unveiled her private collection of ELVIS memorabilia in two new exhibits at Graceland -- and ET was there!

"Private Presley" commemorates the 50th anniversary of The King's induction into the army (Elvis and Priscilla met while the singer was stationed in Germany) and includes actual uniforms worn by Elvis along with fatigues and his actual army foot locker. The "'68 Special" exhibit commemorates the performer's landmark comeback special that aired that year. Also in the exhibit are personal mementos such as bongos that Priscilla gave her man for Christmas!

"My dad gave me 35 dollars to go find a gift for him," she tells ET, "and I found these bongo drums; he actually kept them and he used them."